Circuit for separating simultaneously reproduced PCM and ATF signals having at least partially overlapping frequency bands.

摘要

In an apparatus, such as an 8-mm VTR, in which a pilot signal (Sp) and a digital signal (Sn) modulated by an information signal, and occupying frequencoy bands that overlap at least in part, are recorded together as an addition signal (St) in a track (T) on a recording medium (20), a D.C. component of the addition signal reproduced from the track (T) is detected and compared, in a voltage comparator (63), with the level of the reproduced addition signal (St) so as to provide the digital signal (Sn) as an output of the voltage comparator (63), and such output of the voltage comparator (63) is subtracted from the reproduced addition signal (St) so as to provide the pilot signal (Sp) without error by reason of the digital signal. Further, the pilot signal (Sp) and cross-talk from adjacent tracks (T) obtained from the first-mentioned subtraction is, in turn, subtracted from the reproduced addition signal (St) for obtaining the digital signal therefrom. and the D.C. component of the digital signal obtained from the second subtraction is detected and compared with the level of the digital signal obtained from the second subtraction for obtaining therefrom the digital signal (Sn) with any errors therein due to the pilot signal and other cross-talk from adjacent tracks (T) being suppressed.